Top 25 Free Things to Do in San Francisco

LOMBARD STREET AND TWIN PEAKS

Eight switchbacks in one long block give the section of Lombard Street between Hyde and Leavenworth the reputation of being the “crookedest street in the world.” It’s on the Hyde Street cable car line, and while you can drive, you’ll appreciate it more if you walk it in full.
At 922 feet, Twin Peaks, a sixty-four-acre mix of grassland and coastal scrub, offers 180-degree views that will give you a glimpse of what San Francisco looked like in its natural state prior to development.

Source by: http://www.msn.com/en-us/travel/budget/top-25-free-things-to-do-in-san-francisco/ss-BBloaKM#image=11